Improvement in water-tube steam-boilers



W. R. PARKS.

WATER TUBESTEAM BOILERS.

No.175,146. Patented March 21,1876.

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UNITED STATES PATENT Orrrcn Q WILLIAM R. PARKS, OF PALMER, MASSACHUSETTS.

IMPROVEMENT IN WATER-TUBE STEAM-BOILERS.

Specification forming part of Letters Patent No. 175,146., dated March 2l, 1876 application filed. February 11, 1876.

To all whom it may concern.-

Be it known that I, WILLIAM R. PARKS, of Palmer, in the State of Massachusetts, have invented a new and useful Improved Steam- Boiler; and that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, and to the letters of reference marked thereon.

The object of my invention is to so combine a coil of pipe with a furnace and steam-chamber that the water introduced into the steamchamber through the pipe may be rapidly and economically converted into steam, without burning out or injuring the pipe. To this end my invention consists of a furnace, divided by partitions into flues, in Which are placed coils of pipe, (each coil being a continuation of the same pipe,) communicating with a steam-chamber placed directly over the grate or fire-box, and separating the.latter from the said pipe, so that the direct heat from the fire will first be exerted upon, or'will impinge upon, the water and steamchamber, while the pipe will be heated by the products of combustion passing through the flues, the particular arrangement of pipe and water and steamchamb er with the furnace being more fully hereinafter described.

Figure I represents a view of the boiler with one side of the furnace removed, showing the pipe arranged in the flues so that the water passing through said pipe and into the water and steam chamber moves in the same direction with the fire or products of combustion passing through the flues; and Fig. II is a similar view of a boiler, with the pipes arranged so that the water passing through the pipe to'the water and steam chamber moves ina direction opposite to that in which the fire or products of combustion pass out through the flues, the steam-chamber in either case being placed below the pipe in the fire-box.

In the drawings, A represents a furnace divided into flues E F G by the vertical partitions H, leaving openings at n and '11, through for the fire and smoke to pass up, is placed in the flue G or fire-box a short distance above the grate a, so that when the fire is made on the grate its direct heat will be exerted against the water and steam chamber, and the pipes will be protected from the too extreme heat by the interposition of the said chamber.

In Fig. I, it will be perceived that the pipe a enters the furnace at f, passes up the flue E, in the form of a coil, in the same direction in which the fire or heat passes, and enters the next flue, F, at b; passes down that flue, as a coil, in the same direction in which the fire or smoke passes, and enters the fire-box at 0, above the water and steam chamber; passes up the flue G, over the fire-box, in the same direction as the fire, to the top, and thence directly down (see pipe 0) and enters the water and steam chamber at m.

In Fig. II the pipe at enters the flue E at f, and extends down that flue in a coil, enters the next flue, F, at b, extends up that flue, and enters the flue G at 0, extends down that in the form of a coil, and thence extends up vertically (see straight pipe 0) to a point in the upper part of the furnace at k, and thence directly down, (see pipe 0,) entering the water and steam chamber B at m, as before.

It will be seen that in either case the water, after passing through the coils a, in the flues E and F, and before entering the water and steam chamber B, has to pass to the top of the flue G, over the fire-box, and thence directly down through the pipe 0 into the chamber B, by which arrangement the pipe a, directly over the said chamber, will be kept fullof water as long as any water remains in the chamber B, so that a gage, properly attached to the end of said chamber B, to indicate the presence of water therein, will also indicate that all the pipes before reaching the chamber are properly filled with water, and, when so filled, it is impossible for the pipes to be burned out or destroyed by the extreme heat. The provision agoinst this contingency, and the consequent danger to human life, is the object I have in View in this arrangement of pipes, water and steam chamber, and furnace. The water, entering the pipe at at for f", passes through said pipe, in the different flues, to the point 70, and is heated to nearly a boiling-point before entering the chamber B, but is not converted into steam until it enters said chamber. The water-gage attached to this chamber indicates the quantity to be kept constantly therein to make steam properly, and this also indicates to a certainty the presence of water in the pipes at all points before entering the chamber, the heat from the fire-box operating to convert the water in the chamberinto steam first.

I am aware that steam-generators of this class have heretofore been made, but having a different arrangement of pipes, steam-chamber, and the furnace, as shown in the patent to John Gouldin g August17, 1875, No. 166,768, and I do not claim such arrangement, nor any part thereof, irrespective of the arrangement herein shown and described. In Gouldings device the pipe, when the steam is formed, is located nearest the firebox, between the grate and the steam-chamber, and enters the latter at the top, and as steam in the pipe will not prevent it from being burned out, the destruction of the pipe is the sure result.

In my device the water cannot be converted into steam until it has passed entirely through the pipe and enters the water and steam chamber B, and the gage connected with the said chamber always indicates the amount of water in the chamber, and, consequently,,in the pipe.

Having thus described my invention, what I claim as new is- The combination of the furnace A, having fines E F G therein, the pipe-coil a, extending through said flues,the water and steam chamber B, located between the grate e and the coil a, and wholly below the coil, and the pipe 0, connecting said coil with the lower part of the water and steam chamber B, all substantially as and for the purpose described.

WILLIAM R. PARKS.

Witnesses T. A. CURTIS, O. E. BUGKLAND. 

